Comfort Glow CGN20TB, CGN30TLB, CGN30TB, CGN20TLB User Manual
®
BLUE FLAME VENT-FREE NATURAL GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
i
CGN20TB
CGN20TLB
CGN30TB
CGN30TLB
Heater Sizes: 20,000 Btu/Hr Thermostat and
30,000 Btu/Hr Thermostat Model Heaters
i
/
/
WARNING: If the information in this manual is not I
followed exactly, a fire or explosion may result
causing property damage, personal injury, or loss
Lof ife.
m Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
m WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the fire
department.
Installation and service must be performed by a
qualified installer, service agency, or the gas supplier.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited
by state or local codes.
* Aftermarket: Completion of sale, notforpurposeofresale,fromthe manufacturer
This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not
convertible for use with other gases.
WARNING: Improper instal-
lation, adjustment, alter-
ation, service, or mainte-
nance can cause injury or
]
property damage. Refer to
this manual for correct in-
stallation and operational
procedures. For assistance
or additional information
consult a qualified installer,
service agency, or the gas
supplier.
WARNING: This is an
unvented gas-fired heater.
It uses air (oxygen) from the
room in which it is installed.
Provisions for adequate
combustion must be pro-
vided. Refer to page 4 of this
manual.
BLUE FLAME NATURAL GAS HEATER
I,
SAFETY
INFORMATION
A WARNINGS
IMPORTANT: Read this owner's
manual carefully and completely
before trying to assemble, oper-
ate, or service thls heater. Im-
proper use of this heater can
cause serlous Injuryor death from
bums, fire, explosion, elec_rlcal
shock, and carbon monoxlde
polsonlng.
_lb DANGER: Carbon monoxidepoisoning may lead to death!
Carbon Monoxide Poisoning: Early
signsof carbon monoxide poisoning m-
=semblethe flu, with headaches,dizziness,
ornausea. If you have these signs, theheater
may not be working properly. Get fresh air
at once! Have beater serviced. Some people
aremore affected by carbonmonoxide than
others. These include pregnant women,
people with heart or lung disease oranemia,
those under the influence of alcohol, and
those at high altitudes.
Natural Gas: Natural gas is odorless. An
odor-making agent is added to naturalgas.
The odor helps you detect a naturalgasleak.
However, the odor added to natural gascan
fade.Naturalgasmay bepresenteventhough
no odor exists.
Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this heater.
heater or its controls can be dan-
_WARNING: Any change tothis
gerous.
This appliance is only for use with the 10.
typeof gasindicated onthe ratingplate.
This applianceis notconvertible for use
with other gases.
2.
If you smell gas
• shut off gas supply
• do not try to light any appliance 11.
• do not touch any alectrical switch; do
not use any phone in your building
• immediately call your gas supplier 12.
from aneighbor's phone.Follow the
gas supplier's instructions 13.
• if you cannotreachyour gas supplier,
call the fu'e department
This heater shall not be installed in
.
a bedroom or bathroom.
4.
Never install the heater
• in a recreational vehicle
• where curtains, furniture, clothing, or
other flammable objects are less than
36 inches from the front, top, or sides
of the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
5,
This heater needs fresh, outside air
ventilation to run properly. This heater
has an oxygen depletion sensor (ODS)
pilot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Fresh Air for Combus-
tion and Ventilatio_ pages 4 through 6.
6.
Keep air openings in front and bottom
of heater clear and free of debris. This
will ensure enough air for proper com-
bustion.
7. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
8. Do not run beater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
9. Never place any objects on the heater.
Surface of heater becomes very hot
when running heater. Keep children and
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shut-down.
Allow surface to cool before touching.
Carefully supervise young children
when they are in the same room with
heater.
Make sure grill guard is in place be-
fore running heater.
Do not use heater if any part has been
under water. Immediately call a quali-
fied service technician to inspect the
room heater and to replace any part of
the control system and any gas control
which has been under water.
14.
Turn off and unplug heater and let cool
before servicing. Only a qualified ser-
vice person should service and repair
heater.
15.
Operating heater above elevations of
4,500 feet could cause pilot outage.
2 1o4&_ 7
OWNER'S MANUAL
PRODUCT
IDENTIFICATION
Panel
IgnitorButton
ControlKnob
Guard
Glass
Panel
Cabinet
PRODUCT
FEATURES
Safety Device
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
The OI)S/pilot is arequiredfeaturefarvent-
free room heaters. The ODS/pilot shuts off
the heaterif there is not enough freshair.
Plezo Ignition System
This heaterhas a piezo igniWr.This system
requires no nlatehes, batteries, or other
sources to light heater.
Thermostatic Heat Control
Thermostatmodelshaveathermostatsens-
ingbulb and a control valve. This results in
the greatest heater comfort. This can also
resultin lower gas bills.
Figure 1 - Vent-Free Natural Gas Heater (30,000 Btu/Hr Model Shown)
LOCAL CODES
Install and use heater with care. Follow all 1.
local codes. In the absence of loeal codes, use 2.
the latest edition of the National Fuel Gas
CodeANSIZ223.1,aisoknownasNFPA54*. 3.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymareh Park
Quincy, MA 02269
UNPACKING
Remove heater from carton.
Remove all protective packaging ap-
pliedto heater for shipment.
Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
104331 3
BLUE FLAME NATURAL GAS HEATER
FRESH AIR FOR
COMBUSTION AND
VENTILATION
_ WARNING: This heater shall
not be installed in a Confined
space unless provisions are pro-
vided for adequate combustion
and ventilation air. Read the fol-
lowing instructions to Insure
proper fresh air for this and other
fuel-burning appliances In your
home.
Today's homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
help reduce beat loss in homes. Home owners
weather strip and caulk around windows and
doors tokeep the cold air out and the warm air
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following is exerpts from National Fuel
Gas Code. NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation.
All spaces in homes fallinto one of the three
following ventilation classifications:
1. Unusually Tight Contruction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tlght Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However. in
buildings of unusually tight construction.
you must provide additional fresh air.
Unusually tight construction is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10"11kg
per pe.seo.n_) or less with open-
ings gasketed or sealedand
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
twsen sole plates and floors, be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tions for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 6.
If your home does not meet all of the
three criteria above, proceed to De-
termining Fresh-Air Flow For Heater
Location, page 5.
Confined and Unconfined Sp_e
TheNationalFuelGasC-ode(ANSIZ223.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubic feet per 1,000 Btu per hour (4.8 m3per
kw) of the aggregate input rating of all
appliances installed in that space and an
unconfined space as a space whose volume
is not less than 50 cubic feel per 1,000 Btu
per hour (4.8 m3per kw) of the aggregate
input rating of all appliances installed inthat
space. Rooms communicating directly with
the space in which the appliances are in-
stalled*, through opemngs not furnished
with doors, are considered a part of the
unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
*Adjoining rooms are communicating only
ifthere aredoorless passageways orventila-
tion _511Sbetween them.
4 Io433!
OWNER'S MANUAL
FRESH AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksbeet to determine if you have a confined orunconfined space.
S pace: Includes theroom inwhich you will installheater plus any adjoining rooms with doorless passageways or ventilation grilIsbetween
the rooms.
1. Determine the volume of the space ('lengthx width x height).
l..¢ngth x Width x Height = eu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 eu. ft. (volt_ee of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the vohmm of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hrthe space can support.
(volume of space) + 50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) + 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hrthe spac_ can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater Btu/Hr
Gas water heater* Btu/Hr Example:
Gas furnace Btu/Hr Gas water heater 40,000 Btu/Hr
Vented gas heater Btu/Hr Vent-free heater + 20,000 Btu/Hr
Gas fireplace logs Btu/l-Ir Total = 60,000 Btu/I-lr
Other gas appliances* + Btu/Hr
Total = Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
Btu/Hr (maximum the space can support)
Btu/l-Ir (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support)
60,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/I-Irthe space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
WARNING: Ifthe area in which the heater may be operated is smaller than that defined as an unconfined space,
provide adequate combustion and ventilation air by one of the methods described inthe National FuelGas Code,
ANSI Z223.1, 1992, Section 5.3 or applicable local codes.
Continued
I04_I 5
BLUE FLAME NATURAL GAS HEATER
FRESH AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
This freshairwould come from anadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12"of the ceiling and one within 12"of the
floor on the wall connecting the two spaces
(see options 1and 2, Figure2). You can also
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANSI Z223.1, Section
5.3, Air for Combastion and Ventilation for
required size of ventilation grills orducts.
Vent,atlon
Gdlls
intoAdjoining
Room,
Option
Ventilation Gdlls
Into/_olnlng Room,:
Option 2
,_ WARNING: Rework work-
sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces.
IMPORTANT: Do not provideopenings for
inlet or outlet air into attic if attic has a
thermostat-controUed power vent. Heated air
entering the attic will activate the power vent.
Figure 2 - Ventilation Air from Inside Building
Outlet
Air
Inlel
Air
Inlet Air
Figure 3 - Ventilation Air from Outdoors
To Attic
............... To
tHI6H....P
_] Crawl
IIIIIIIIIIIIIIII
Space
Ventilated
Crawl Space
6 104331
OWNER'S MANUAL
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat. Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heat source. If you have a central
heating system, you may run
system's circulating blowerwhne
using heater. This will help circu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
NOTICE: A qualified service per-
son must install heater. Follow
all local codes.
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural gas, do not install heater. Call
dealer where you bought heater for proper
type heater.
INSTALLATION ITEMS
Before installing heater, make sure you have
the items listed below.
• piping (check local cedes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection * (see Figure 13,
page 10)
• sediment trap
• tee joint
• pipe wrench
• test gauge connection*
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 18.
LOCATING HEATER
This heater is designed tobe mounted on a
wall.
_k WARNING: Maintain the mini-
mum clearances shown In Figure
4.ffyou can, provide greater clear-
ances from floor, ceiling, and join-
ing wall.
You can locate heateronfloor, away from a
wall. An optional floor mounting stand is
needed. Purchase the floor mounting stand
from your dealer. See Accessories, page 18.
WARNING: Never install the
heater
• in a bedroom or a bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where Impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) In the air exist, may
discolor walls.
IMPORTANT: Vent-free heaters addmots-
tare to the air. Although this is beneficial,
installing heater in rooms without enough
ventilationair may causemildew toform from
too much moisture. See Fresh Airfor Com-
bustion and Ventilation, pages 4 through6.
CAUTION: If you Install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
• Iocete heater where moving ve-
hicle will not hit it
Forconvenianceandefficiency, install heater
• where there is easy access for operation,
inspection, and service
• in coldest part of room
An optional fan kit is available from your
dealer. See Accessories, page 18. If plan-
ning to use fan, locate heater near an electri-
cal outlet.
Minimum
=" to Top
FLOOa Sudace
of Carpeting or
Other Combustible
Material
Figure4-MountlngClearancesAsViewed
From Frontof Heater
104331 7
Comin_d
BLUE FLAME NATURAL GAS HEATER
INSTALLATION
Continued
THERMOSTAT SENSING
BULB
The thermostat sensing bulb has been
placed inside the heater for protection
during shipping.
Locating Thermostat Sensing
Bulb
1. Remove front panel of heater (see Fig-
ure 7).
2. Locate thermostat sensing bulb just
under burner assembly.
IMPORTANT: Attach thermostat sensing
bulb to back of heater for properoperation.
Attaching Thermostat Sensing
Bulb
1. Remove thermostat sensing bulb from
holders inside heater. Route through
slot opening in bottom of heater.
2. Place clamp on thermostat sensing bulb
as shown in Figure 5. Clamp is pro-
vided in hardware package.
3. Snap clamp into upper mounting hole
as shown in Figure 5. Mounting hole is
located on lower left edge on back of
heater. Make sure the thermostat sens-
is pointing up.
Thermostat
INSTALUNG HEATER TO
WALL
Mounting Bracket
The mounting bracket is located on back
panel of heater. It has been taped there for
shipping. Remove mounting bracket from
back panel.
Figure 6 - Bracket Location
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel.
2. Lit_straightupon gfiUguard untilitstops.
Grill guard will slideup about 1/4",
3. Pull bottom of front panel forward, then
downward.
4. Remove cardboard packing from grill
and glass.
Attaching to wall stud:This method
provides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.
Attaching to wall anchor: Thismethod
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Decide which method better suits your needs.
Either method will provide asecure hold for
the mounting brackeL
Marking Screw Locations
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
_kWARNING: Maintain minimum
clearances shown in Figure 8. If
you can, provide greater clear-
ancas from floor and joining wall.
2. Mark screw locations on wall (see Fig-
ure 8).
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
3. Remove tape and mounting bracket
from wall.
\ /I
Only Insert MoLmtlng 18 3/4"
Screws Through Last MI_.
Hole On Each End
Figure 5- Attaching Thermostat Sensing
Bulb
Figure 7- Removing Front Panel Of Heater
Methods For Attaching
Mounting Bracket To Wall
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways.
1. Attaching to wall stud
2. Attaching to wall anchor
8 104331
30,000 Btu/Hr Model
Screws Through Last MIn.
20,000 Btu/Hr Models
Figure 8 - Mounting Bracket Clearances
18 3/4"
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